[x265] [ANN] x265 1.8 released

Deepthi Nandakumar deepthi at multicorewareinc.com
Thu Oct 8 12:56:56 CEST 2015


x265 version 1.8 has been released. This release supports 12bit input
depths, a large amount of AVX2 optimizations, entropy coding optimizations,
as well as new quality features.

Full documentation is available at http://x265.readthedocs.org/en/stable/
<http://x265.readthedocs.org/en/1.7/>

=================================== API Changes
========================================================

   - Experimental support for Main12 is now enabled. Partial assembly
   support exists.
   - Main12 and Intra/Still picture profiles are now supported. Still
   picture profile is detected based on x265_param::totalFrames.
   - Three classes of encoding statistics are now available through the
   API.
   - x265_stats - contains encoding statistics, available through
      x265_encoder_get_stats()
      - x265_frame_stats and x265_cu_stats - contains frame encoding
      statistics, available through recon x265_picture
   - --csv
   - x265_encoder_log() is now deprecated
      - x265_param::csvfn is also deprecated
   - --log-level now controls only console logging, frame level console
   logging has been removed.
   - Support added for new color transfer characteristic ARIB STD-B67

================================== New Features
========================================================

   - limit-refs
      - This feature limits the references analysed for individual CUS.
      - Provides a nice tradeoff between efficiency and performance.
      - aq-mode 3
   - A new aq-mode that provides additional biasing for low-light
      conditions.
   - An improved scene cut detection logic that allows ratecontrol to
   manage visual quality at fade-ins and fade-outs better.

================================ Preset and Tune Options
===================================================

   - tune grain
      - Increases psyRdoq strength to 10.0, and rdoq-level to 2.
      - qg-size
   - Default value changed to 32.
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